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| n | a(n) |
|---|---|
| 1 | 28 |
| 2 | 784 |
| 3 | 12752 |
| 4 | 139925 |
| 5 | 1147712 |
| 6 | 7526024 |
| 7 | 41334135 |
| 8 | 196691651 |
| 9 | 831996762 |
| 10 | 3191126598 |
| 11 | 11273703656 |
| 12 | 37147879480 |
| 13 | 115325935123 |
| 14 | 340079259419 |
| 15 | 958837466287 |
| 16 | 2598467396144 |
| 17 | 6797368250655 |
| 18 | 17222433541791 |
| 19 | 42380526618210 |
[28,784,12752,139925,1147712,7526024,41334135, 196691651,831996762,3191126598,11273703656, 37147879480,115325935123,340079259419, 958837466287,2598467396144,6797368250655, 17222433541791,42380526618210] |